Abrasive disk



7 'INVENTOR A TToR/vv w. C. HAPP ABRASIVE DISK March 7, 1933.

Filed Dec. l0 1928 acme Ma. a i933 er., e, me, or sourir amm, miami, sesiones 'ro rmi s'rnna: i 1 norma, or sourir amm, INDIANA. .a ooaroaarron or NEW JERSEY RASIVE DISK .Application filed December 10, 1828. Serial No. 324,91.

e article of manufacture forming the subject of this invention is a flat abradmg disk and the invention relates specifically to an im roved construction having a flexible 5 metallic base adapted to receive the abrasive material adhesively secured thereto.

@ne of the objects of the present invention is to provide an abrading disk having an open mesh metallic base formed of wire screen, metal cloth or similar material which. is adapted to yield when pressure is applied thereto.

A further object of the invention is to rovide an abrading disk having a metallic ase of the material heretofore defined which has paper o r similar vegetable material secured to one face thereof and abrasive material adhesively secured to the other face thereof.

A still further object is to provide an abradingdisk having a flexible metallic base reinforced adjacent to its periphery with a rcinforcing ring, the base and the ring being covered on one surface with paper or similar material, the opposite face of the base being covered with a cloth disk on which is adhesively applied the abrasive material.

These being among theobjects of the present invention, the same consists of certain feaa suitable embodiment of the present inven tion Figure 1 is a plan view of my preferred l form of disk, certain of the parts being 4o broken away to more clearly show the invention. y

Figure 2 is an enlarged section taken on the line 2--2 of Figure 1. A v Figure 3 is a plan view showing a modified form of my invention, certain parts being broken away to more clearly show the relation of the respective elements.

n Fi re 4 is anrv enlarged section taken on the line 4-4 of Figure 3.

Figure 5 is a further modified form of my tures of construction `and combinations ofinvention, certain of theiparts being broken away to more clearly show the invention.

Figure 6 is an enlarged sectional view taken on the line 6-6 of Figure 5.

In automobile body building plants and in other factories where it is desirable and neces'- sary to remove rough spots on the metal, abrasive disks driven by grinding machines having flexible shafts have come into a general use, the rough spots being removed substantially in the same manner as dentists smooth up fillings and rough places on the teeth. The abrasive disks heretofore used have been very expensive and unsatisfactory because no satisfactory backing member has been used. Heretofore the abrading material has been adhesively applied to paper disks or to cloth disks reinforced with a sheet of paper. In either case the life of the disk is very short due to the fact that it is very brittle and as it isf-caused to travel at a high rate of speed portions of the same are broken away or chipped olf thus completely destroying its further utility. Also, when the disks are run over rough spots or hit an obstruction, the cloth or paper, or both, tear and break away which makes the disks unfit for further use. Furthermore, the abrasive material on the disks wears off very quickly and the base of the disks heretofore used 1s not substantial enough to permit of the vrecoating of the same.

The present inventioncomprises an abrading disk which has a metallic backing member suiciently yieldable for` use in any of the places where the paper or cloth disks can be used without tearing or breaking away which would render the disk unfit for further use,

and when the abrasive material is worn oi the backing member or bod of the disk can be re-coated and used equa y as satisfactory as the original disk. i

Referring particularly to Figure 1 of the f drawing, my invention comprises a yielding flexible disk consisting of wire screen 0r woven cloth base 10 on oneface of which'is applied a coating of adhesive material or binding agent 11 to which is applied the abrasive material 12. In manufacturing the disk, the binding agent or adhesive is apt to run through the mesh of the base 10 and adhere to other disks and to prevent the adhesive from contacting with other disks, ll preferably apply a sheet of paper or similar material 13 to the base 10 on the side opposite the abrasive material.

lin Figures 3 and 4, ll have shown a Wire screen or metal cloth base member 10 on which is a layer of fabric or the like 14, the same being secured to the base by an adhesive or binding agent 15. rlhe abrasive material 12 is secured on the cloth 14 by glue or adhesive material 16 in the same manner that the abrasive material 12 is secured to the base 10, as shown in Figures 1 and 2. rll`he paper or like material 13 is also preferably used as a. backing for the base 10 and is secured thereto either by the adhesive 15 Which may penetrate through the mesh of the base 10, or an additional coating of adhesive may be applied thereto if necessary to retain the backing sheet 13 in position.

lln Figures 5 and 6, ll have shown a further modification of my invention which comprises a reinforcing ring 17 preferably secured adjacent the periphery of the base 10 on the side opposite the cloth sheet 14. lin this construction of disk, the cloth 14 and the abrasive 12 are applied to the base in the same manner as is shown in Figures 3 and 4 and a further description of the same is believed to be unnecessary. 'llhe backing member 13 is preferably of the same diameter as the base 10 and thus completely covers the base 10 and the reinforcing member 17. However, if desired thebackingmember13 canbe ofasmaller diameter and fit within the ring 17 on the base member 10. The reinforcing ring 17 is preferably formed of relatively thin spring steel. However, it is understood that my invention is not limited to a ring of spring steel but the same may be formed of fiber board, rubber, bakelite, or any other suitable material adapted for use as a reinforcement.

l have heretofore referred to the use of paper for the disk 13 and have also referred to a clothsheet as covering the base 10. 1 do not Wish to limit my invention to the use of paper and cloth for these respective disks but instead it is to be understood that l may use any non-metallic,` material which is sufficiently yieldable so that the composite structure will be capable of distortion Without injury to the same. ll have, therefore, referred to these members 13 and 14 as being formed of a vegetable material, it being understood that these members may be of any non-metallic material capable of the necessary yieldability.

1t is to be understood that formal changes may be made in the specific embodiment of the invention described Without departing from the spirit and substance of the broad invention, the scope of which is commensurate V with the appended claims.

j thereof.,

3. An abrasive element'comprising a Woven metallic circular base, a reinforcing ring secured thereto adjacent the periphery thereof, a sheet formed of a vegetable material adhesively secured to said base, and abrasive material adhesively secured to said sheet.

4. Ain abrasive element comprising a Woven metallic base, a sheet formed of a vegetable material adhesivelyv secured thereto, and abrasive material adhesively secured to Said sheet, the composite structure being suficiently pliable to permit distortion Without disruption thereof.

5. An abrasive element comprising a Woven metallic circular base, a reinforcing ring secured thereto adjacent the periphery thereof` a backing formed of a vegetable material adhesively secured to said base, a sheet formed of a vegetable material adhesively secured to said base on the side opposite said backing, and abrasive material adhesively secured to said sheet, the composite structure being sufiiciently pliable to permit distortion without disruption thereof.

6. An abrasive element comprising a Wire screen base, a paper backing adhesively secured thereto, a cloth sheet adhesively secured to said base on the side opposite said paper backing, and abrasive material adhesively secured to said cloth sheet, the composite structure having yielding marginal portions and a central portion sufficiently rigid to permit the element to be driven therefrom.

7. An abrasive element comprising a Wire screen circular base, a reinforcing ring secured thereto adjacent the periphery there? of., a paper backing adhesively secured to said base, a cloth sheet adhesively secured to said base on the side opposite said backing, and abrasive material adhesively secured to said sheet, the composite structure having yielding marginal portions inwardly of said ring and a central portion sufficiently rigid to permit the element to be driven therefrom.

8. An abrasive element comprising a. yield ing flexible disk consisting of a flexible Woven metallic base, reinforcing means secured thereto adjacent the periphery thereof, and

lll() abrasive material adhesively secured to said base on the side opposite said reinforcing means.

9. An abrasive element comprising a yielding flexible disk consisting of a flexible Woven metallic base, a sheet formed of a vegetable material secured to one face thereof, a second sheet formed of avegetable material secured to the other face thereof, and abrasive material adhesively covering the Working face of one of said sheets.

10. An abrasive grinding disk comprising a wire gauze disk having the apertures therein filled with a porous substance to form a relatively smooth surface, and abrasive material adhesively secured to said surface,

1l. An abrading member comprising a Woven metallic base, a coating of adhesive material applied to the metallic base, and a layer of granulated abrasive material applied on one surface of the adhesive material, the composite structure being sutlciently pliable to permit distortion Without disrupting the same.

Signed by me at South Bend, Indiana, this 5th day of December, 1928.

WILLAFD C. HAPP. 

